Which backup strategy guarantees that a company can restore data from short-, medium-, and long-term backups and, never loses more than a day's worth of data and always has a year's worth of backups?

A rotation scheme for backup media is grandfather-father-son. The "son" backups for a typical small company would be labelled Monday, Tuesday, Wednesday, and Thursday. They are overwritten seven days later. There would always be four or five "father" backups because they are created every Friday and overwritten a month later. The grandfather backups won't be overwritten for a year because they are only created once a month. According to the 3-2-1 backup rule, you need three copies of your data—two on separate media, and one off-site. According to Moore's law, technology doubles every two years, and the on-site/off-site backup rule does not exist.